Altough DRBD might expect or require low latency, a multiple datacenter setup might be still achievable. I guess it depends really on the physical distance and the latency on the network. On my job we are using two datacenters, the are physically within 20 kilometers and network latency is below 0.4 ms. This setup allows for a split DC setup. It will all depend on the actual network latency, not if it is in one or two data centers. I’ve seen datacenters where the latency was bad within one datacenter (5-10 ms for a simple ping)
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